Display Panel Driving Method Synchronizing Voltage With Frequency Switching
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Solution Overview
Problem
Conventional high refresh rate display panels experience brightness differences and severe flickering when switching between high and low frequencies, leading to unsatisfactory display effects and user experience.
Innovation Solution
A driving method for display panels that adjusts the data voltage of data lines and switching voltage of pixels synchronously with frequency changes, incorporating a first and second stage in the display period with differing durations, and adjusting voltage values to match electrical leakage between high and low frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If freesync technology is used to achieve high refresh rates, then display refresh frequency is improved, but brightness differences and flickering occur during frequency switching
Solution Approach 1:
The patent changes the voltage parameters (data voltage and switching voltage) according to the refresh frequency. When switching between high and low refresh rates, the voltage values are adjusted to compensate for electrical leakage differences, thereby maintaining stable brightness across frequency transitions
Solution Approach 2:
The patent implements dynamic voltage adjustment based on the current refresh frequency. The data voltage and switching voltage are not fixed but are dynamically changed according to the frequency switching state, allowing the display panel to adapt to different operating conditions and eliminate flickering
2Device complexity
If the same charging time is used for different frequencies, then device complexity is reduced, but display quality deteriorates due to flickering
Solution Approach 1:
Instead of changing the charging time structure, the patent changes the voltage parameters (data voltage and switching voltage) to compensate for frequency-related electrical leakage differences. This approach maintains the simple same-duration charging time structure while improving display quality through voltage adjustment
Data Source
AI summary
A driving method of a display panel and a display device are provided. During a display period of a frame of image, when the display panel performs frequency switching, a data voltage of data signal line of the display panel or a switching voltage of pixels of the display panel is changed synchronously with the frequency switching of a displayed image, effectively alleviating problems of flickering and unsatisfactory display quality when switching between different signal frequencies, and improving a performance of the display panel.